1606136545 has 8 divisors (see below), whose sum is σ = 2075622696. Its totient is φ = 1186070016.

The previous prime is 1606136507. The next prime is 1606136549. The reversal of 1606136545 is 5456316061.

It can be written as a sum of positive squares in 4 ways, for example, as 281467729 + 1324668816 = 16777^2 + 36396^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1606136545 - 2²³ = 1597747937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606136549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12354832 + ... + 12354961.

It is an arithmetic number, because the mean of its divisors is an integer number (259452837).

Almost surely, 2^1606136545 is an apocalyptic number.

It is an amenable number.

1606136545 is a deficient number, since it is larger than the sum of its proper divisors (469486151).

1606136545 is a wasteful number, since it uses less digits than its factorization.

1606136545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24709811.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1606136545 is about 40076.6334040174. The cubic root of 1606136545 is about 1171.1004682472.

The spelling of 1606136545 in words is "one billion, six hundred six million, one hundred thirty-six thousand, five hundred forty-five".